Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked

Re^2: Monitoring child processes

by rovf (Priest)
on Mar 13, 2012 at 15:49 UTC ( #959386=note: print w/replies, xml ) Need Help??

in reply to Re: Monitoring child processes
in thread Monitoring child processes

I had thought about waitpid with NO_WAIT (I have used a similar solution in a different application), but I was interested in get it to run by using kill 0. Actually, this seems to work so far, only that I didn't understand, why I had to 'IGNORE' SIGCHLD explicitly. Actually, I got the idea to use kill instead of waitpid from an example at perlipc:
Another interesting signal to send is signal number zero. This doesn't actually affect a child process, but instead checks whether it's alive or has changed its UID.
unless (kill 0 => $kid_pid) { warn "something wicked happened to $kid_pid"; }
This seemed to be an attractive and easy solution - that's why I wanted to try it out.

Ronald Fischer <>

Log In?

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://959386]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others having an uproarious good time at the Monastery: (7)
As of 2022-05-19 16:43 GMT
Find Nodes?
    Voting Booth?
    Do you prefer to work remotely?

    Results (72 votes). Check out past polls.